ORIGINAL MESSAGE:
On Fri, 2 Apr 2010 00:23:16 -0700, "Jim Thomson" <Jim.thom@telus.net>
wrote:
>## another thing I learned [ the hard way] way to disconnect both vac
>tune and vac load
>caps, and install the B+k 875 across each one, and note down the exact
>pf, for every turn
> of the turns counter, from MIn to MAX.
REPLY:
Agreed, except for the tune cap, I would leave it connected to the
tube anode, so the tube's capacitance is included in your
measurements. After all, that is the actual value you will be using in
the amp. But you can add it in later if you want. Your call.
If you do have the tube connected and you are using a low frequency
C-meter such as the AADE unit, disconnect the plate choke or it will
throw you off, way off.
73, Bill W6WRT
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